DUAL MULTI-COMPONENT REFRIGERATION CYCLES FOR LIQUEFACTION OF NATURAL GAS

A process is disclosed for liquefying natural gas to produce a pressurized liquid product having a temperature above -112 ¦C using two mixed refrigerants in two closed cycles, a low-level refrigerant to cool and liquefy the natural gas and a high-level refrigerant to cool the low-level refrigerant....

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Bibliographische Detailangaben
1. Verfasser:	E. LAWRENCE KIMBLE, III
Format:	Patent
Sprache:	eng ; spa
Schlagworte:	BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING MIXTURES BY PRESSURE AND COLD TREATMENT REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING WEAPONS
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Beschreibung
Zusammenfassung:	A process is disclosed for liquefying natural gas to produce a pressurized liquid product having a temperature above -112 ¦C using two mixed refrigerants in two closed cycles, a low-level refrigerant to cool and liquefy the natural gas and a high-level refrigerant to cool the low-level refrigerant. After being used to liquefy the natural gas, the low-level refrigerant is (a) warmed by heat exchange in countercurrent relationship with another stream of the low-level refrigerant and by heat exchange against a first stream of the high-level refrigerant, (b) compressed to an elevated pressure, and (c) aftercooled against an external cooling fluid. The low-level refrigerant is then cooled by heat exchange against a second stream of the high-level mixed refrigerant and by exchange against the low-level refrigerant. The high-level refrigerant is warmed by the heat exchange with the low-level refrigerant, compressed to an elevated pressure, and aftercooled against an external cooling fluid. Se describe un proceso para licuar gas natural para producir un producto liquido presurizado que tiene una temperatura de por encima de -112¦C utilizando dos refrigerantes mezclados en dos ciclos cerrados, un refrigerante de bajo nivel para enfriar y licuar el gas natural y un refrigerante de alto nivel para enfriar el refrigerante de bajo nivel. Despues de haber sido utilizado para licuar el gas natural, el refrigerante de bajo nivel (a) se calienta por intercambio de calor en una relacion de contracorriente con otra corriente de refrigerante de bajo nivel y por intercambio de calor contra una primera corriente del refrigerante de alto nivel, (b) se comprime a una presion elevada, y (c) se enfria despues contra un fluido de enfriamiento externo. El refrigerante de bajo nivel entonces es enfriado por intercambio de calor contra una segunda corriente de refrigerante mezclado de alto nivel y por intercambio contra el refrigerante de bajo nivel. El refrigerante de alto nivel es calentado por intercambio de calor con el refrigerante de bajo nivel, comprimido a una presion elevada, y enfriado despues contra un fluido de enfriamiento externo.